Anterior retractor



FIG. 1 is a perspective view of an anterior retractor according to the present ornamental design.

FIG. 2 is a first end plan view of the anterior retractor shown in FIG. 1.

FIG. 3 is a top view of the anterior retractor shown in FIG. 1.

FIG. 4 is a side view of the anterior retractor shown in FIG. 1; and,

FIG. 5 is a second end plan view of the anterior retractor shown in FIG. 1. 

The ornamental design for an anterior retractor, as shown and described. 